gnu-social/plugins/ActivityPub/ActivityPub.php

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<?php
declare(strict_types = 1);
namespace Plugin\ActivityPub;
use App\Core\Event;
use App\Core\Modules\Plugin;
use App\Core\Router\RouteLoader;
use App\Core\Router\Router;
use Exception;
use Plugin\ActivityPub\Controller\Inbox;
use Plugin\ActivityPub\Util\Response\ActorResponse;
use Plugin\ActivityPub\Util\Response\NoteResponse;
use Plugin\ActivityPub\Util\Response\TypeResponse;
class ActivityPub extends Plugin
{
public function version(): string
{
return '3.0.0';
}
/**
* This code executes when GNU social creates the page routing, and we hook
* on this event to add our Inbox and Outbox handler for ActivityPub.
*
* @param RouteLoader $r the router that was initialized
*/
public function onAddRoute(RouteLoader $r): bool
{
$r->connect(
'activitypub_actor_inbox',
'/actor/{gsactor_id<\d+>}/inbox.json',
[Inbox::class, 'handle'],
options: ['accept' => self::$accept_headers],
);
$r->connect(
'activitypub_actor_outbox',
'/actor/{gsactor_id<\d+>}/outbox.json',
[Inbox::class, 'handle'],
options: ['accept' => self::$accept_headers],
);
$r->connect(
'activitypub_inbox',
'/inbox.json',
[Inbox::class, 'handle'],
options: ['accept' => self::$accept_headers],
);
return Event::next;
}
/**
* Validate HTTP Accept headers
*
* @param bool $strict Strict mode
*
* @throws Exception when strict mode enabled
*/
public static function validateAcceptHeader(array|string|null $accept, bool $strict): bool
{
if (\is_string($accept)
&& \in_array($accept, self::$accept_headers)
) {
return true;
} elseif (\is_array($accept)
&& \count(
array_intersect($accept, self::$accept_headers),
) > 0
) {
return true;
}
if (!$strict) {
return false;
}
throw new Exception(
sprintf(
"HTTP Accept header error. Given: '%s'",
$accept,
),
);
}
public static array $accept_headers = [
'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
'application/activity+json',
'application/json',
'application/ld+json',
];
/**
* @throws Exception
*/
public function onControllerResponseInFormat(string $route, array $accept_header, array $vars, ?TypeResponse &$response = null): bool
{
if (\count(array_intersect(self::$accept_headers, $accept_header)) === 0) {
return Event::next;
}
switch ($route) {
case 'actor_view_id':
case 'actor_view_nickname':
$response = ActorResponse::handle($vars['actor']);
return Event::stop;
case 'note_view':
$response = NoteResponse::handle($vars['note']);
return Event::stop;
/*case 'actor_favourites_id':
case 'actor_favourites_nickname':
$response = LikeResponse::handle($vars['actor']);
return Event::stop;
case 'actor_subscriptions_id':
case 'actor_subscriptions_nickname':
$response = FollowingResponse::handle($vars['actor']);
return Event::stop;
case 'actor_subscribers_id':
case 'actor_subscribers_nickname':
$response = FollowersResponse::handle($vars['actor']);
return Event::stop;*/
default:
if (Event::handle('ActivityStreamsTwoResponse', [$route, &$response])) {
return Event::stop;
}
return Event::next;
}
}
public function onFreeNetworkGenerateLocalActorUri(string $source, int $actor_id, ?string &$actor_uri): bool
{
if ($source !== 'ActivityPub') {
return Event::next;
}
$actor_uri = Router::url('actor_view_id', ['id' => $actor_id], Router::ABSOLUTE_URL);
return Event::stop;
}
}